macrocosm vs existence

macrocosm and existence both are nouns.

Word	Noun	Adjective	Verb	Adverb
macrocosm	Yes	No	No	No
existence	Yes	No	No	No

As nouns, macrocosm and existence are synonyms defined as:

Other synonyms of macrocosm include cosmos, creation, universe, world.

macrocosm (noun)	existence (noun)
everything that exists anywhere	everything that exists anywhere
	the state or fact of existing